I am depending on this bottle shadow on the back wall to pull this painting together since both bottle and flower only connect with a stem. We'll see.
I tried to get a handle on the values so that when I start the painting I can be more aware of the dark against light, light against dark dynamics. For the sketch I used Burnt Umber and turp. Lifted out the light areas with turp and used more umber for the darks. This will be my underlay for the start of my painting. Now all I have to do is fill in the blanks with the correct color values!